/Engine/Source/Runtime/Core/Public/Misc/CoreDelegates.h
Called with arguments passed to the application on statup, perhaps meta data passed on by another application which launched this one.
static [TMulticastDelegate](API\Runtime\Core\Delegates\TMulticastDelegate)< void(const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > &)> ApplicationReceivedStartupArgumentsDelegate;